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Boulder Opal Necklace One-of-a-kind 18k yellow gold large ovular chain link necklace set with various cuts of boulder opal. 138tcw.

Boulder Opal Necklace yellow gold large ovular chain link necklace set with various cuts of boulder opal.

Exceptional Boulder Opal Necklace- Katherine Jetter

Katherine Jetter, Black Opal Necklace - Black Opal set in Yellow Gold with round link chain Z

Stunning 22.63-carat Australian Black Opal Pendant. Accented with 2.50 carats of tsavorite garnets and 1.50 carats of diamonds (all set in 18k white gold), that opal is amazing. Mauboussin has always been known for a particular expertise in colored stones, and this piece really allows you see the artistry in gem-setting and jewelry design, as the garnets perfectly complement and draw out the green within the opal.

Stunning Australian Black Opal Pendant accented with carats of Tsavorite garnets and carats of diamonds (all set in white gold).

Edwardian diamond and pink tourmaline pendant on chain, the central round mixed-cut pink tourmaline estimated to weigh approximately 1 carat, in claw setting within an Art Nouveau open-work foliate scroll design set with old cut diamonds with a further oval mixed-cut tourmaline estimated to weigh approximately 1.25 carats, suspended from a knife-bar and diamond link, on a platinum trace chain.

Edwardian diamond and pink tourmaline pendant on chain, the central round mixed-cut pink tourmaline estimated to weigh approximately 1 carat, in claw setting within an Art Nouveau open-work foliate scroll design set with old cut diamonds with a further ov

Swiss Gold Enamel and Diamond Pendant Watch, ca. 1910, Z Z

Swiss Gold Enamel & Diamond Pendant Watch, circa 1910 Case: yellow gold with guilloche light blue - Available at 2009 MAY Signature Timepieces.

Belle Époque Brooch

PENDANT BROOCH set with a circular-cut yellow sapphire, trimmed with rose-cut diamonds, within a calibré-cut demantoid garnet and rose-cut diamond overlapping surround, mounted in platinum and gold, circa